YMF752
AC'97 Rev2.1 Audio CODEC with SRC
YAMAHA CORPORATION
Decembe 3, 1998
Preliminary
YMF752 CATALOG
CATALOG No.:LSI-4MF752A02
July 2, 1999
OVERVIEW
YMF752 is an AC'97 Audio CODEC LSI, which is fully compliant with the industry standard "Audio
CODEC '97" component specification (Revision 2.1).
YMF752 includes a SRC (Sampling Rate Converter) for supporting variable sampling rate and an AC-Link
serial interface. Therefore, YMF752 is the best audio solution for both laptops and desktop PCs as well as
AMR (Audio Modem Riser) and MDC (Mobile Daughter Card).
YMF752 also supports low power consumption while normal operating and allows for controlling the power
down mode.
FEATURES
AC'97 Revision 2.1 Compliant
Exceeds PC98 / PC99 Audio Performance Requirements
Analog Inputs:
- 4 Stereo Inputs: LINE, CD, VIDEO, AUX
- 2 Monaural Inputs: Speakerphone and PC BEEP Inputs
- 2 Independent Microphone Inputs
PC BEEP can directly output to Line Out
Internal +20dB amplifier circuitry for microphone
Analog Outputs: Stereo LINE Output, True LINE Level and Monaural Output
Supports 3D Enhancement (Wide Stereo)
Supports Variable Sampling Rate (48k/44.1k/22.05k/16k/11.025k/8kHz)
Programmable Power Down Mode
Supports EAPD (External Amplifier Power Down)
Power Supplies: Analog 5.0V, Digital 3.3V
48-Pin SQFP Package (YMF752-S)
The following functions are supported by using the software driver from YAMAHA.
XG Wave Table Synthesizer
Downloadable Sound (DLS)
Legacy Audio (Sound Blaster Pro compatibility and FM Synthesizer) on Pure DOS
The contents of this catalog are target specifications and are subject to change
without prior notice. When using this device, please recheck the specifications.
XG logo is a trademark of YAMAHA Corporation.
GENERAL MIDI logo is a trademark of Association of Musical Electronics Industry (AMEI),
and indicates GM system level 1 compliant.
YMF752
July 2, 1999
2
PIN CONFIGURATION
48-Pin SQFP Top View
48
47
46
45
44
43
42
41
40
39
38
37
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
13
14
15
16
17
18
19
20
21
22
23
24
TE
S
T
EAP
D
CODEC ID1#
CODEC ID0#
(
N.C
.)
(
N.C
.)
A
V
ss2
LNLV
L_O
U
T_R
(
N.C
.)
LNLV
L_O
U
T_L
AVdd2
M
O
NO
_O
UT
LINE_OUT_R
LINE_OUT_L
TEST
ENABLE
CAP4
CAP3
CAP2
CAP1
Vrefout
Vref
AVss1
AVdd1
DVdd1
XTL_IN
XTL_OUT
DVss1
SDATA_OUT
BIT_CLK
DVss2
SDATA_IN
DVdd2
SYNC
RESET#
PC_BEEP
PHO
N
E
AU
X_
L
AU
X_
R
VIDEO_
L
VIDEO_
R
CD_
L
CD_
G
N
D
CD_
R
MIC1
MIC2
LI
NE
_I
N_L
LI
NE
_I
N_R
YMF752
July 2, 1999
3
PIN DESCRIPTION
No.
Name
I/O
Function
1
DVdd1
-
Digital power supply (+3.3V)
Connect to the digital ground with 0.1
m
F and 47
m
F capacitors.
Connect this pin to DVdd2.
2
XTL_IN
I
24.576MHz Clock Input
3
XTL_OUT
O
24.576MHz Clock Output
4
DVss1
-
Digital ground. Connect this pin to DVss2.
5
SDATA_OUT
I
AC'97 Serial Input Stream
6
BIT_CLK
I/O
AC'97 Bit Clock
7
DVss2
-
Digital ground. Connect this pin to DVss1.
8
SDATA_IN
O
AC'97 Serial Output Stream
9
DVdd2
-
Digital power supply (+3.3V)
Connect to the digital ground with 0.1
m
F and 47
m
F capacitors.
Connect this pin to DVdd1.
10
SYNC
I
SYNC Input (Fixed at 48kHz)
11
RESET#
I
Hardware Reset
12
PC_BEEP
AI
PC Speaker Beep
13
PHONE
AI
Telephony Input
14
AUX_L
AI
AUX Input Left Channel
15
AUX_R
AI
AUX Input Right Channel
16
VIDEO_L
AI
Video Audio Input Left Channel
17
VIDEO_R
AI
Video Audio Input Right Channel
18
CD_L
AI
CD Audio Input Left Channel
19
CD_GND
AI
CD Audio Analog Ground
Connect this pin to CD Ground or Analog Ground.
20
CD_R
AI
CD Audio Input Right Channel
21
MIC1
AI
Microphone Input 1
22
MIC2
AI
Microphone Input 2
23
LINE_IN_L
AI
Line Input Left Channel
24
LINE_IN_R
AI
Line Input Right Channel
25
AVdd1
-
Analog Power Supply (+5.0V)
Connect to the analog ground with 0.1
m
F and 47
m
F capacitors.
Connect this pin to AVdd2.
26
AVss1
-
Analog ground. Connect this pin to AVss2.
27
Vref
AO
Analog Reference Voltage
Connect to the analog ground with 0.1
m
F and 10
m
F capacitors.
28
Vrefout
AO
Analog Reference Voltage Output
YMF752
July 2, 1999
4
No.
Name
I/O
Function
29
CAP1
A
Capacitor Connection Pin
Connect to the analog ground with a 560pF capacitor.
30
CAP2
A
Capacitor Connection Pin
Connect to the analog ground with a 560pF capacitor.
31
CAP3
A
Capacitor Connection Pin
Connect to the analog ground with a 1000pF capacitor.
32
CAP4
A
Capacitor Connection Pin
Connect to the analog ground with 0.1
m
F and 10
m
F capacitors.
33
ENABLE
I+
Normally, do not connect externally.
In case of "low" level, YMF752 do not operate.
34
TEST
I+
LSI Test Pin (Do not connect externally.)
35
LINE_OUT_L
AO
Line Output Left Channel
36
LINE_OUT_R
AO
Line Output Right Channel
37
MONO_OUT
AO
Monaural Output
38
AVdd2
-
Analog power supply (+5.0V)
Connect to the digital ground with 0.1
m
F and 47
m
F capacitors.
Connect this pin to Avdd1.
39
LNLVL_OUT_L
AO
True LINE Level Output Left Channel
40
(N.C.)
-
Do not connect externally.
41
LNLVL_OUT_R
AO
True LINE Level Output Right Channel
42
AVss2
-
Analog ground. Connect to Avss1.
43
(N.C.)
-
Do not connect externally.
44
(N.C.)
-
Do not connect externally.
45
CODEC ID0#
I+
CODEC ID (Do not connect externally.)
46
CODEC ID1#
I+
CODEC ID (Do not connect externally.)
47
EAPD
O
External Amplifier Power Down
48
TEST
O
LSI Test Pin (Do not connect externally.)
Note) AI: Analog Input Pin, AO: Analog Output Pin, I+: Input Pin with a Pull-up resistor
YMF752
July 2, 1999
5
BLOCK DIAGRAM
Master L
32step
0dB/
+20dB
MU
X
AUX_L
AUX_R
VIDEO_L
VIDEO_R
CD_L
CD_GND
CD_R
LINE_IN_R
PHONE
MIC2
MIC1
A/D
A/D
AC'97
digital
I/F
D/A
D/A
MU
X
RESET#
MU
X
MU
X
PC_BEEP
LNLVL_OUT_R
LINE_OUT_L
MONO_OUT
VREF
T
i
m
i
ng G
e
ne
r
a
t
o
r
SYNC
BIT_CLK
SDATA_OUT
SDATA_IN
XTL_OUT
XTL_IN
Vr
ef
Vref
ou
t
CA
P
4
A
V
ss(
2
)
A
V
dd(2)
DVdd(2)
D
V
ss(
2
)
Left
Right
MIC
32step
LINE
32step
CD
32step
VIDEO
32step
AUX
32step
Monaural
32step
PC Beep
16step
PHONE
32step
LNLVL
L 32step
LNLVL
R 32step
PCM R
32step
PCM L
32step
Record R
16step
Record L
16step
Vol
u
m
e
Con
t
r
o
l
Power down
Con
t
r
o
l
3D
LINE_OUT_R
LNLVL_OUT_L
Master R
32step
MU
X
LINE_IN_L
CD Left
CD Right
BUF
EAPD
CODEC ID0#
CODEC ID1#
CA
P
3
CA
P
2
CA
P
1
MU
X
SRC
ENABLE
PDF 
ZIP